Saw-swage



(No Model.)

-A. CARMICHA'EL SAW SWAGE.

110. 316,113. Patented 11111211885.

IQlNrrEn STATES@ iPArENtr rrrca ALEXANDER oAniuronAEL, on LA'onossE, wrscoNsrN.

SAW-SWAGE.

' SPECIFICATION forging part of Letters Patent No. elellanatea April 21,` 1385. j

' Applicati n filed Xovemhcr 22, 1884. (No model.) Y l porting the saws firmly in operative position,

and protecting the under side of the teeth, in

a tooth-swaging roller loosely mounted within and partly protruding from a socket or recess in a shaft or mandrel, means for removably securing said roller in position, and means for imparting rotary motion to said shaft, all as hereinafter described and claimed.

In the accompanying drawings, Figure l represents a perspective view of my improved apparatus, showing a saw in position for being swaged. Fig. 2 represents an enlargedv detail view of a portion of the operative shaft or mandrel and the tooth-swaging roller and parts connected therewith.

It is the design of my invention to construct a saw-swage for swaging the teeth of mill and other saws which shall be inexpensive and durable in construction, of few parts, and capable of withstanding all the strain to which such devices are usually subjected.

A represents a standard or post for supporting the saw-holder and the mechanism for operating upon the teeth of the saws.

B represents the sawrest,which is supported in the post, and is vertically adjustable thereon by means of a screw, as shown, to adapt it for supporting saws of different widths, and is also adjustable by means of transverse screws to and from the post, to adapt the same to support saws of different thicknesses, and also angularly,to receive different-shaped saws, so as to bring the teeth thereof into proper position for being acted upon by the device.

Grepresents a saw in position for being operated upon.

D represents a shaft mounted in bearings E in the head or upper portion of the post A. Upon one end of this shaft D is mounted a gear wheel, F, which meshes withanother gear-wheeler pinion, G, mounted upon a shaft, H, having suitable bearing in the arm or offset I, attached to or formed integral with the standard A. The shaft H extends outwardly from the pinion or gear wheel G, and has attached thereto a band-pulley, J, around which is passed a belt connecting with any suit-able motive power for rotating said pulley J. revolves it will, through the medium of the gear-wheels F and G, connecting therewith, :impart a rotary motion to the operative shaft D.

Although I have shown the shaft D, for carrying the tooth-'dressing device, as hereinafter described, 'as rotated through the medium of intermeshing gears and a band-pulley connected with operative mechanism, said shaft can readily be connected directly to any suitvention of such gears and pulley. rlhe inner end of the operative shaft D projects outwardly from the innermost journal box or bearing E a sufficient distance to project trans- Y It will thus be seen`that as said pulley J f able operative mechanism without the interversely across but above the teeth of the saw C when in position on the saw-rest B. Longitudinally of this projecting portion of said shaft is formed a slot or groove, K, which eX- tends a short distance inward beneath the inner journal-box E, said slot or groove being of awidth corresponding to the circumference of either journals L, formed on each end of the roller M, or of a rigid rod or shaft passed through said roller M, and upon which the tooth-dressing lroller M is mounted, in order that said journal rod or shaft may rest snugly therein, the inner end of said shaft 'or journal being clamped in position by said j ournal-boX, while its outwardly-projecting end is held in position within said groove or slot by a button or latch, N, pivoled to the projecting end of the shaft D. O represents a transverse socket formed in the'slotted portion of the shaft D,to receive the tooth-dressing roller M, which is loosely mounted upon the rigid shaft or journals L, so as to have free movement thereon, and also so as to project beyond the surface of the operative shaft D. It will thus be observed that the tooth-dressing roller M is a dead7 roller, and remains` at rest at all times,even during the rotation of the shaft D, until it comes in contact with the tooth of the saw to be dressed, which it does at each revolution of the shaft D, said roller M being by means of the latch N capable of being readily removed from and .replaced in position, or other rollers substituted therefor, when desired.

Pv represents a block or anvil, which is mortised through the frame of the machine and held in position by a key underneath, and

which, when the saw is placed in position, i

rests between the teeth, so that the under side of the tooth to be dressed rests against said block, and is supported and heldfirmly in position thereby, while the upper edge of the tooth is being dressed by the roller M. By this arrangement the shape of the under side of the teeth is preserved, so that a very light dressing, if any, of that side is necessary for putting the tooth in order for work.

The shaft D, roller M, and anvil or block P may be made of steel or any suitable metal or material.

The saw C having been adjusted in position, in the manner shown in the drawings, so as to bring the teeth thereof in line vertically with the tooth-dressing roller M, protruding from the shaft D, with the under side of the tooth to be dressed resting against the block or anvil P, motion is imparted to the shaft D, so as to revolve the same in the direction indicated by the arrow 1. rIhen,when such revolution of said shaft D brings the roller M into contact with the upper edge of the saw-tooth, the pressure of said roller against the sawtooth will force the roller to rotate in a direction contrary to the revolution of the shaft, as shown by arrow 2, thereby rolling the point of the sawtooth to the desired shape without creating any more friction upon the parts than is absolutely necessary to secure the proper dressing of the tooth under treatment. By this method a durability of shape is imparted to the teeth of the saw, and the dressing thereof is obtained more rapidly and with a less eX- penditure of labor and with the employment of less mechanism than with any device or method with which I am acquainted.

The saw-rest has a shallow groove along its upper side, into which the saw fits loosely. One end of the rest can be raised or lowered independent of general movement of the rest, so as to give the saw whatever inclination is required by pitch of teeth, or to render it adapted to receive and hold saws of different degrees of width or angularity longitudinally.

When a tooth is swaged, the saw is pulled outwardly away from the anvil by hand and slid along this groove until the next tooth is opposite the anvilface, when it is pushed back into position. The strain parallel with same is received directly by anvil; hence this right-angle movement is no detriment.

Having thus described my invention, I claim- 1. In a saw-swaging apparatus, the combination, with a suitable base or support, of a saw-rest adjustably supported thereon, a shaft mounted therein, and having connected to one end thereof suitable driving mechanism, and at its opposite end a longitudinal and transverse slot or recess, a tooth-dressing roller having endjournals and loosely mounted within said recessed end of the driving shaft, so as to rotate independently thereof upon coming in contact with the saw-teeth, and a button or latch pivotally connected to the projecting end of said driving-shaft, and adapted at its opposite end to engage with and hold the outwardly-projecting end of the journal of the tooth-dressing roller and said roller in position, substantially as set forth.

2. In a saw-swaging apparatus, a saw-rest adapted to be adjusted to receive saws of different widths and thicknesses, and also to hold the same at different degrees of inclination, and having in its upper face a longitudinal groove to receive the saws, substantially as and for the purpose set forth.

3. In a saw-swaging apparatus, the combination, with a suitable frame or support, of a saw-rest adjustably connected thereto, and adapted to receive and hold saws of different sizes and shapes and at different inclinations, and having a shallow groove along its upper side to permit of the transverse movement of 95 the saws, a block or anvil mortised within said frame, a driving-shaft having a slotted or recessed end, a tooth-dressing roller journaled within said recess and adapted to rotate independently of the driving-shaft, and suitable mechanism for actuating said drivingshaft,.

substantially as set forth. ALEXANDER CARMIGHAEL. Witnesses:

H. P. MAGILL, W. YV. SMITH.

IOO 

